Maybe in the fanfiction, Naruto discovers some dark secrets about Konoha. Secrets like the way the village leaders have used him or other unethical practices. If he finds out that Konoha has been manipulating him all along, he would naturally start to care less about the village. For instance, if he learned that they were planning to sacrifice him for the so - called greater good without his knowledge, it would be a huge blow to his loyalty.
One possible reason could be that Naruto has been mistreated by the villagers in Konoha for a long time. Despite his efforts to gain acceptance, if he's constantly faced with rejection or unfair treatment, it might lead to him not caring. For example, when he was a child, many villagers shunned him because he was the host of the Nine - Tails. This continuous negative experience could build up over time and cause him to lose his sense of loyalty to Konoha.
He could feel betrayed by the village. For instance, if they wrongly accused him of something or didn't support him when he needed it. In fanfiction, this could lead to him turning his back on Konoha. Another possibility is that he meets someone who convinces him that Konoha's values are wrong, and there are better ways to live outside of the village.
The fanfiction changes the relationship dynamics within the Naruto world. Usually, Konoha is at the center of Naruto's universe. But now, with Naruto not caring about it, other elements like his personal relationships outside Konoha or his own self - discovery become more prominent. It shifts the focus from the village - centered story to a more individual - centered one.
Naruto could be tired of the expectations placed on him. Everyone has always assumed he would be Hokage since he was a child. He might want to break free from those expectations and define his own path. He may feel that being Hokage is more about fulfilling others' wishes for him rather than his own true desires. So, he decides he doesn't want to be Hokage in this fanfiction.
One possible reason could be that Naruto discovers some dark secrets about the village leadership that go against his values. For example, if he finds out that they have been using underhanded means to maintain power.
It could also be related to the way Konoha has dealt with other issues like the Uchiha clan massacre. If Naruto discovers some aspects of Konoha's involvement in it that he finds morally unacceptable, such as covering up the truth or being complicit in some way. This could make him lose faith in Konoha and be unable to forgive it.
In fanfiction, Naruto might snap at Konoha if he feels betrayed by his friends or the village. For example, if they don't support him when he tries to make important changes or if they side with someone who has wronged him. Also, if the village starts to become too controlling or authoritarian in the fan - created story, Naruto, with his free - spirited nature, would likely snap.
Maybe Naruto has seen too many unrealistic or out - of - character portrayals of Konoha in the fanfiction. For example, some might make Konoha overly cruel or its people too stupid, which goes against his understanding and love for his village.
Naruto might forgive Konoha because he realizes that holding a grudge won't solve anything. He has seen the destruction that hatred can cause, like during the Pain arc. So, he chooses to forgive in order to move forward and bring about positive change. Another reason could be his respect for the previous Hokages and their ideals for Konoha.
One possible reason could be a sense of disillusionment. Maybe Naruto discovers some dark secrets within Konoha's leadership that make him question his loyalty. For example, if he finds out that some decisions were made that put the village at risk for the wrong reasons.
One possible reason could be that Naruto feels misunderstood in Konoha. Maybe some villagers still hold grudges against him despite his efforts to protect the village. He might run out to find a place where he can truly be accepted for who he is.